This is quite cool. So I was working on this a bit more today (have made slow progress in general). If you watch this video the most important stuff is happening in the very top left.
Sunlight = 1000 (23)
means the amount of energy coming in from sunlight is 1000 units and the number of chloroplasts is 23. It’s the same with HtwoS for how much hydrogen sulfide there is an how many chemoplasts.
Periodically the patch changes from 1000 sunglight and 0 H2S → 0 sunlight and 1000 H2S (which is obviously totally unrealistic). What you can see is cool though is that the species adapt and the amount of chloroplasts and chemoplasts adapts to the environment. When there is a lot of sunlight and no H2S the amount of chloroplasts is high and chemoplasts is low.
So this already means we could have a load of different biomes and just run this sim on them and it would make cells which are somewhat adapted to them.
I think maybe the amount of random mutation needs to be decreased and a more intelligent selection system would make this all smoother, but I don’t want every species becoming the same. Anyway nice bit of progress 
